Haque, N and Mullis, AM orcid.org/0000-0002-5215-9959 (2019) Order–Disorder Morphologies in Rapidly Solidified Ni3Ge Intermetallic. JOM, 71 (8). pp. 2728-2733. ISSN 1047-4838
Abstract
Congruently melting intermetallic, single-phase Ni3Ge (Tm = 1132°C) has been rapidly solidified via drop-tube processing, wherein powders, with diameters between ≥ 850 μm and ≤ 38 μm, with equivalent cooling rates of ≤ 700 to > 54,500 K s−1, were produced. Six dominant solidification morphologies were identified with increasing cooling rate, explicitly, (I) spherulites, (II) mixed spherulites and dendrites, (III) dendrites—orthogonal, (IV) dendrites—nonorthogonal, (V) recrystallized, and (VI) dendritic seaweed, are observed imbedded within a featureless matrix. Selected area diffraction (SAD) in the transmission electron microscope analysis confirmed that it is only the spherulite microstructure that is partially ordered among these microstructures, which are disordered. However, SAD analysis indicated that the featureless background material of all of these microstructures is chemically ordered. Thermal analysis indicates a nonreversible reaction.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Minerals, Metals & Materials Society 2019. This is an author produced version of an article published in JOM. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Jul 2019 10:56 |
Last Modified: | 13 Jun 2020 00:38 |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s11837-019-03587-5 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:148765 |